Transcript PowerPoint 프레젠테이션

Custom Network Protocol on
Modified Ring Topology
Team: Radical
Leader: Dallas Edwards
Members: Sam Sieg
Sani Musayev
Changyong Jung
Introduction
• Modified ring topology
• Linux based chat system
• Rewrite/Build Custom
OSI-Model
• Network Monitoring
tools
• File transfer system
Motivation
• CUSTOM RING TOPOLOGY:
-Five machines in a ring topology
-Every node can act as a
bridge/router or carry out its own
functions as a single entity.
• OSI Model:
-Modulization
-Standard implementation model
Custom Ring Topology
C1: 4 NICs, 4 connections, a gateway to other subnets
B1, A1, A2, B2: 2 NICs, 2 connections
Limitations
• Not scalable beyond 25 hosts
• Linux based system only
• No encryption in Presentation layer
Method
• Connection to Physical Medium:
- Discovery System (Remote-Hosts)
• Network Stack:
- Discovery of hardware on a local host
• Routing algorithms
- Vector distance routing algorithms
- Packet forwarding
• Flow Control
- Throttling
- Drop rate analysis
• Dataflow multiplexing:
- Pipelining dataflow into Programs
- Management of multiple Program data flows
Results
•
•
•
•
•
Ability to send/receive Ethernet packets
Communication among all layers
Working chat application
File transfer capability
Each layer is autonomous and independent
Conclusion
• Whole OSI network model is successfully
re-built as our own
• Each layer works independently and can communi
cate properly
• The Chat application is working in our network st
ack environment
• Above our own network model, the ring topology
is successfully constructed.
• For the future, advanced network stack
might be needed to support multi-platform enviro
nment
References
[1] Douglas E. Comer, Internetworking with TCP/IP, pp 95 – 173, 2000. Pre
ntice Hall
[2] RFC2003: IP Encapsulation within IP,
http://portal.acm.org/citation.cfm?id=RFC2003
[3] Richard Stevens, Unix Network Programming, pp 85 – 110, pp 655 – 70,
pp 703 – 726, 1998. Prentice Hall
[4] Kay A. Robbins & Steven Robbins, Practical UNIX Programming, pp333
– 400, 1996. Prentice Hall.
[5] Andreas Schaufler, RAW Ethernet vs. UDP,
http://www.landshut.org/bnla01/members/Faustus/fh/linux/udp_vs_raw/in
dex.html
[6] Chae Y. Lee & Seok J. Koh, A design of minimum cost ring-chain networ
k with dual-homing survivability: A tabu search approach, Computers &
Operations Research, Volume 24,
Issue 9, September 1997, pp 883-897
[7] Brian "Beej" Hall, Beej's Guide to Unix Interprocess Communication,
http://beej.us/guide/ipc/
[8] Pradeep Padala, NCURSES Programming HOWTO,
http://tldp.org/HOWTO/NCURSES-Programming-HOWTO/
Experiments…